Rotary crusher feeding aid



May 27, 1969 H. c. KERN ROTARY CRUSHER FEEDING AID Filed Dec. 19, 1966 uvvmv TOR flan/e Conrad/512m United States Patent 3,446,444 ROTARY CRUSHER FEEDING AID Harvey Conrad Kern, Coopersburg, Pa., assignor to Bethlehem Steel Corporation, a corporation of Delaware Filed Dec. 19, 1966, Ser. No. 602,893 Int. Cl. B02c 15/10, 17/04, 23/02 US. Cl. 241-202 1 Claim ABSTRACT OF THE DISCLOSURE Background of the invention This invention relates to a rotary crusher having means to separate heavier material from the lighter material to be crushed.

It is often desirable to prevent heavy material, which is present in material to be crushed, from entering the crushing cavity of a crusher. For example, in the crushing of slag produced by steel plants where the heavy material may be a mixture of slag and iron or manganese, this mixture is difficult to crush and may cause damage to the crusher.

In the past, machines have been used to separate or classify material according to weight. The machines utilized vibratory or rotary tables or cylinders or conveyor and baffle arrangements. Generally, these machines are a separate unit apart from a crusher. As such, the unit requires its own motion producing means. In addition, such units occupy a relatively large floor space and are expensive to maintain and operate.

Summary of the invention It is an object of this invention to provide a single machine which economically crushes and separates material according to weight.

The foregoing object can be attained by attaching a suitable receptacle to the rotating member of a rotary crusher and positioning the receptacle to receive material prior to crushing.

Brief description of the drawings FIG. 1 is a top view taken on the line 1-1 of FIG. 2. FIG. 2 is a side view, partly in section.

Description of the preferred embodiments Referring to the drawings, the machine includes a rotary cone type crusher, well known in the art. The crusher comprises a frame which is attached to a foundation 11 by bolts 12. Secured to and extending upwardly from the frame 10 is a bowl 13. A wear resistant circular bowl liner 14 is secured to the lower interior surface of bowl 13. A hopper 15 is secured to the upper interior surface of the bowl 13. Hopper 15 extends above the bowl 13 and has an upper cylindrical portion 16 and a lower conical portion 17.

Attached to the lower portion of the frame 10 is a gear housing 18. A countershaft 19 extends through the gear housing 18 and countershaft bearing 20, attached to gear housing 18. One end of countershaft 19 has a pulley 21 secured thereto. Motor 22 through motor pulley 23 and belts 24 drive pulley 21 and countershaft 19. The other end of countershaft 19 has a pinion 25 attached thereto. Pinion 25 drives a gear 26 which is secured to eccentric 27. Eccentric 27 has an opening 28 extending therethrough for receiving a tapered shaft 29. The opening 28 in eccentric 27 tapers to a smaller diameter at its lower end and has its longitudinal axis 43 inclined with respect to the vertical axis 44 of the crusher. An inner eccentric bearing 30 is positioned between shaft 29 and eccentric 27 to allow the shaft 29 to rotate relative to the eccentric 27. An outer eccentric bearing 31 is positioned between eccentric 27 and eccentric housing 32 fixed to frame 10 to allow eccentric 27 to rotate relative to the frame 10. Step bearing 33 is positioned beneath eccentric 27 and shaft 29 to sustain the load of the shaft 29 and the components attached thereto.

Secured to shaft 29 near its upper end is a conical mantle 34. Positioned above the mantle 34 and secured to shaft 29 is a feed plate 35. The outer surface of mantle 34 is spaced from the inner surface of the bowl liner 14. The spacing between the mantle 34 and bowl liner 14 defines the crushing cavity. The amount of spacing varies from one side of the mantle 34 to the other side according to the position of shaft 29 and eccentric 27 due to the inclination of the axis 43 of the shaft 29 with respect to the vertical axis 44.

Secured to feed plate 35 by bolts 36 is a receptacle 37 having a circular side wall 38, inclined with respect to vertical axis 44, and a bottom portion 39 perpendicular to side wall 38. Openings 40 may be provided in side wall 38. Also, bottom portion 39 may be eliminated and side wall 38 secured directly to feed plate 35. In this case, feed plate 35 would be the bottom portion of the receptacle 37.

Positioned directly above the receptacle 37 is the end of a conveyor 41 which discharges material 45 to be crushed into the receptacle 37.

In operation, material 45, such as slag and a mixture of slag and iron or manganese, is delivered to conveyor 41 which discharges the material into the receptacle 37.

Motor 22 through motor pulley 23 and belts 24 drives countershaft 19 and pinion 25. Pinion 25 drives gear 26 and eccentric 27. Since shaft 29 is positioned in opening 28 of eccentric 27, shaft 29 revolves with eccentric 27. This motion is passed to receptacle 37 which is fixed to the upper end of shaft 29. Thus, the material to be crushed in receptacle 37 is subjected to an eccentric motion causing the heavier material to settle to the bottom 39 of the receptacle 37 and the lighter material to be displaced over the side 38 of the receptacle 37 into the crushing cavity formed by bowl liner 14 and mantle 34. The introduction of material to the crushing cavity causes the mantle 34 to rotate due to the resistance of the material to be crushed. This rotation is passed to the shaft 29 and receptacle 37. Thus, in addition to revolving about a vertical axis 44, receptacle 37 also rotates about its own inclined avis 43. After the material is crushed in the crushing cavity between mantle 34 and bowl liner 14, the crushed material passes downwardly and out of the crusher through an opening 42.

The rate of flow of material 45 from conveyor 41 should be regulated to be approximately equal to the rate of flow of material from receptacle 37.

If openings 40 are provided in side wall 38 of receptacle 37, the size of such openings 40 should be substantially equal to the size of material desired after crushing. This size opening assures that all pieces of heavy material, which may damage the crusher, will be retained in the receptacle 37.

From time to time, the above operation is stopped and the heavy material which has been trapped in the receptacle 37 is removed therefrom.

I claim: a size substantially equal to size of the material 1. In a rotary crusher embodying a crushing cavity, after crushing. an upwardly extending member adapted to rotate about an axis inclined relative to the vertical axis of said Referen e Cit crusher, to revolve about said vertical axis, and to crush material in said crushing cavity, and 0 UNITED STATES PATENTS means to 50 move Said membgr, 2,917,247 12/1959 Gruender 241-202 2,971,705 2/1961 Werner 24l-202 the improvement comprising:

a receptable having a side wall and a bottom fixed to the upper end of said member and positioned 10 ANDREW JUHASZ Prlmary Examinerto receive material to be crushed and to dis- FRANK T,Y()$T, Assistant E i charge the lighter material of said material to be crushed to said crushing cavity, said side US. Cl. X.R. wall having a plurality of openings therein of 241--215 

